BCM43455 Datasheet, PDF (131/159 Pages) Cypress Semiconductor – Single-Chip 5G WiFi IEEE 802.11ac MAC/Baseband/ Radio with Integrated Bluetooth 4.1 and FM Receiver

BCM43455 Preliminary Data Sheet
Internal Regulator Electrical Specifications
Section 18: Internal Regulator Electrical
Specifications
Core Buck Switching Regulator
Note: Values in this data sheet are design goals and are subject to change based on device
characterization results.
Note: Functional operation is not guaranteed outside of the specification limits provided in this section.
Table 44: Core Buck Switching Regulator (CBUCK) Specifications
Specification
Notes
Min. Typ.
Input supply voltage (DC) DC voltage range inclusive of disturbances.
3.0 3.6
PWM mode switching
frequency
CCM, Load > 100 mA VBAT = 3.6V
–
4
PWM output current
–
–
–
Output current limit
–
–
1400
Output voltage range
Programmable, 30 mV steps. Default = 1.35V
1.2 1.35
PWM output voltage DC
accuracy
Includes load and line regulation.
Forced PWM mode.
–4 –
PWM ripple voltage, static Measure with 20 MHz bandwidth limit.
–
7
Static Load. Max. Ripple based on VBAT = 3.6V,
Vout = 1.35V, Fsw = 4 MHz, 2.2 μH inductor L >
1.05 μH, Cap + Board total-ESR < 20 mΩ, C_out > 1.9
μF, ESL<200 pH
PWM mode peak efficiency Peak Efficiency at 200 mA load
78 86
PFM mode efficiency
10 mA load current
70 80
Start-up time from power VIO already ON and steady. Time from REG_ON –
400
down
rising edge to CLDO reaching 1.2V.
External inductor
0806 size, 2.2 µH, DCR=0.11Ω, ACR=1.18Ω @ –
2.2
4 MHz
External output capacitor
Ceramic, X5R, 0402, ESR <30 mΩ at 4 MHz,
4.7 µF ±20%, 6.3V
2.0 4.7
External input capacitor
For SR_VDDBATP5V pin, ceramic, X5R, 0603,
ESR < 30 mΩ at 4 MHz, ±4.7uF ±20%, 6.3V
0.67^{b 4.7}
Input supply voltage ramp-up 0 to 4.3V
time
40 –
Max. Unit
5.25^{a V}
–
MHz
600 mA
–
mA
1.5 V
4
%
20 mVpp
–
%
–
%
500 μs
–
μH
10^{b μF}
–
μF
–
μs
a. The maximum continuous voltage is 5.25V. Voltages up to 6.0V for up to 10 seconds, cumulative duration, over
the lifetime of the device are allowed. Voltages as high as 5.0V for up to 250 seconds, cumulative duration, over
the lifetime of the device are allowed.
b. Total capacitance includes those connected at the far end of the active load.
Broadcom^®
November 5, 2015 • 43455-DS109-R
BROADCOM CONFIDENTIAL
Page 130